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author | Andy Wingo <wingo@pobox.com> | 2021-01-20 21:52:54 +0100 |
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committer | Andy Wingo <wingo@pobox.com> | 2021-01-20 23:03:56 +0100 |
commit | a91b95cca2d397c84f8b9bbd602d40209a7092ce (patch) | |
tree | 2c286a291f5a2b812d6e216be10936f2709d59cf /m4/visibility.m4 | |
parent | 758b31994cff582c7e8785b4cc2240dbf3573837 (diff) | |
download | guile-a91b95cca2d397c84f8b9bbd602d40209a7092ce.tar.gz |
Update Gnulib to v0.1-4379-g2ef5a9b4b
Also bump required autoconf version to 2.64, as required by Gnulib.
Diffstat (limited to 'm4/visibility.m4')
-rw-r--r-- | m4/visibility.m4 | 74 |
1 files changed, 37 insertions, 37 deletions
diff --git a/m4/visibility.m4 b/m4/visibility.m4 index ce00e7250..6e4b46150 100644 --- a/m4/visibility.m4 +++ b/m4/visibility.m4 @@ -1,5 +1,5 @@ -# visibility.m4 serial 5 (gettext-0.18.2) -dnl Copyright (C) 2005, 2008, 2010-2017 Free Software Foundation, Inc. +# visibility.m4 serial 6 +dnl Copyright (C) 2005, 2008, 2010-2021 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. @@ -29,42 +29,42 @@ AC_DEFUN([gl_VISIBILITY], dnl First, check whether -Werror can be added to the command line, or dnl whether it leads to an error because of some other option that the dnl user has put into $CC $CFLAGS $CPPFLAGS. - AC_MSG_CHECKING([whether the -Werror option is usable]) - AC_CACHE_VAL([gl_cv_cc_vis_werror], [ - gl_save_CFLAGS="$CFLAGS" - CFLAGS="$CFLAGS -Werror" - AC_COMPILE_IFELSE( - [AC_LANG_PROGRAM([[]], [[]])], - [gl_cv_cc_vis_werror=yes], - [gl_cv_cc_vis_werror=no]) - CFLAGS="$gl_save_CFLAGS"]) - AC_MSG_RESULT([$gl_cv_cc_vis_werror]) + AC_CACHE_CHECK([whether the -Werror option is usable], + [gl_cv_cc_vis_werror], + [gl_save_CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS -Werror" + AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM([[]], [[]])], + [gl_cv_cc_vis_werror=yes], + [gl_cv_cc_vis_werror=no]) + CFLAGS="$gl_save_CFLAGS" + ]) dnl Now check whether visibility declarations are supported. - AC_MSG_CHECKING([for simple visibility declarations]) - AC_CACHE_VAL([gl_cv_cc_visibility], [ - gl_save_CFLAGS="$CFLAGS" - CFLAGS="$CFLAGS -fvisibility=hidden" - dnl We use the option -Werror and a function dummyfunc, because on some - dnl platforms (Cygwin 1.7) the use of -fvisibility triggers a warning - dnl "visibility attribute not supported in this configuration; ignored" - dnl at the first function definition in every compilation unit, and we - dnl don't want to use the option in this case. - if test $gl_cv_cc_vis_werror = yes; then - CFLAGS="$CFLAGS -Werror" - fi - AC_COMPILE_IFELSE( - [AC_LANG_PROGRAM( - [[extern __attribute__((__visibility__("hidden"))) int hiddenvar; - extern __attribute__((__visibility__("default"))) int exportedvar; - extern __attribute__((__visibility__("hidden"))) int hiddenfunc (void); - extern __attribute__((__visibility__("default"))) int exportedfunc (void); - void dummyfunc (void) {} - ]], - [[]])], - [gl_cv_cc_visibility=yes], - [gl_cv_cc_visibility=no]) - CFLAGS="$gl_save_CFLAGS"]) - AC_MSG_RESULT([$gl_cv_cc_visibility]) + AC_CACHE_CHECK([for simple visibility declarations], + [gl_cv_cc_visibility], + [gl_save_CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS -fvisibility=hidden" + dnl We use the option -Werror and a function dummyfunc, because on some + dnl platforms (Cygwin 1.7) the use of -fvisibility triggers a warning + dnl "visibility attribute not supported in this configuration; ignored" + dnl at the first function definition in every compilation unit, and we + dnl don't want to use the option in this case. + if test $gl_cv_cc_vis_werror = yes; then + CFLAGS="$CFLAGS -Werror" + fi + AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM( + [[extern __attribute__((__visibility__("hidden"))) int hiddenvar; + extern __attribute__((__visibility__("default"))) int exportedvar; + extern __attribute__((__visibility__("hidden"))) int hiddenfunc (void); + extern __attribute__((__visibility__("default"))) int exportedfunc (void); + void dummyfunc (void) {} + ]], + [[]])], + [gl_cv_cc_visibility=yes], + [gl_cv_cc_visibility=no]) + CFLAGS="$gl_save_CFLAGS" + ]) if test $gl_cv_cc_visibility = yes; then CFLAG_VISIBILITY="-fvisibility=hidden" HAVE_VISIBILITY=1 |